/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraParameterStore.h
template<typename T> [TOptional](API\Runtime\Core\IO\TOptional)< T > GetParameterOptionalValue ( const [FNiagaraVariableBase](API\Plugins\Niagara\FNiagaraVariableBase) & Parameter ) const